Taking apart the lower unit is a good educational project . Not really hard. Find yourself one of those portable work tables where the table is split and cranks open. You can open it and put the gear case up side down in it and secure it in place. You can also put it up right to do the impeller and drive shaft seal. Makes it easy to work on. If you do one , You will be doing more . Make sure you replace the shift shaft o ring. That usually leaks. Invest in at-least a pressure tester. 13 psi works for me.
